Role of Delays in Shaping Spatiotemporal Dynamics of Neuronal Activity in Large Networks

1. Phys Rev Lett. 2005 Jun 17;94(23):238103. doi: 10.1103/PhysRevLett.94.238103.
Epub 2005 Jun 16.

Role of delays in shaping spatiotemporal dynamics of neuronal activity in large
networks.

Roxin A(1), Brunel N, Hansel D.

Author information:
(1)Laboratory of Neurophysics and Physiology, UMR8119 CNRS, Université René
Descartes, 45 Rue des Saints Pères, 75270 Paris Cedex 06, France.

We study the effect of delays on the dynamics of large networks of neurons. We
show that delays give rise to a wealth of bifurcations and to a rich phase
diagram, which includes oscillatory bumps, traveling waves, lurching waves,
standing waves arising via a period-doubling bifurcation, aperiodic regimes, and
regimes of multistability. We study the existence and the stability of the
various dynamical patterns analytically and numerically in a simplified rate
model as a function of the interaction parameters. The results derived in that
framework allow us to understand the origin of the diversity of dynamical states
observed in large networks of spiking neurons.

DOI: 10.1103/PhysRevLett.94.238103
PMID: 16090506 [Indexed for MEDLINE]

Auteurs Bordeaux Neurocampus